diff options
Diffstat (limited to 'drivers/ieee1394/sbp2.c')
| -rw-r--r-- | drivers/ieee1394/sbp2.c | 45 |
1 files changed, 16 insertions, 29 deletions
diff --git a/drivers/ieee1394/sbp2.c b/drivers/ieee1394/sbp2.c index f0763b79723..372a7726063 100644 --- a/drivers/ieee1394/sbp2.c +++ b/drivers/ieee1394/sbp2.c @@ -1740,28 +1740,15 @@ static int sbp2_create_command_orb(struct scsi_id_instance_data *scsi_id, command_orb->misc |= ORB_SET_SPEED(scsi_id->speed_code); command_orb->misc |= ORB_SET_NOTIFY(1); /* Notify us when complete */ - /* - * Get the direction of the transfer. If the direction is unknown, then use our - * goofy table as a back-up. - */ - switch (dma_dir) { - case DMA_NONE: + if (dma_dir == DMA_NONE) orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER; - break; - case DMA_TO_DEVICE: + else if (dma_dir == DMA_TO_DEVICE && scsi_request_bufflen) orb_direction = ORB_DIRECTION_WRITE_TO_MEDIA; - break; - case DMA_FROM_DEVICE: + else if (dma_dir == DMA_FROM_DEVICE && scsi_request_bufflen) orb_direction = ORB_DIRECTION_READ_FROM_MEDIA; - break; - case DMA_BIDIRECTIONAL: - default: - SBP2_ERR("SCSI data transfer direction not specified. " - "Update the SBP2 direction table in sbp2.h if " - "necessary for your application"); - __scsi_print_command(scsi_cmd); - orb_direction = sbp2scsi_direction_table[*scsi_cmd]; - break; + else { + SBP2_WARN("Falling back to DMA_NONE"); + orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER; } /* @@ -1880,16 +1867,6 @@ static int sbp2_create_command_orb(struct scsi_id_instance_data *scsi_id, command_orb->misc |= ORB_SET_DATA_SIZE(scsi_request_bufflen); command_orb->misc |= ORB_SET_DIRECTION(orb_direction); - /* - * Sanity, in case our direction table is not - * up-to-date - */ - if (!scsi_request_bufflen) { - command_orb->data_descriptor_hi = 0x0; - command_orb->data_descriptor_lo = 0x0; - command_orb->misc |= ORB_SET_DIRECTION(1); - } - } else { /* * Need to turn this into page tables, since the @@ -2371,6 +2348,16 @@ static int sbp2scsi_queuecommand(struct scsi_cmnd *SCpnt, } /* + * Bidirectional commands are not yet implemented, + * and unknown transfer direction not handled. + */ + if (SCpnt->sc_data_direction == DMA_BIDIRECTIONAL) { + SBP2_ERR("Cannot handle DMA_BIDIRECTIONAL - rejecting command"); + result = DID_ERROR << 16; + goto done; + } + + /* * Try and send our SCSI command */ if (sbp2_send_command(scsi_id, SCpnt, done)) { |